EP0942548A3 - Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein - Google Patents

Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein Download PDF

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Publication number
EP0942548A3
EP0942548A3 EP98119793A EP98119793A EP0942548A3 EP 0942548 A3 EP0942548 A3 EP 0942548A3 EP 98119793 A EP98119793 A EP 98119793A EP 98119793 A EP98119793 A EP 98119793A EP 0942548 A3 EP0942548 A3 EP 0942548A3
Authority
EP
European Patent Office
Prior art keywords
transmission power
trunk apparatus
communication system
optical amplifier
power information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98119793A
Other languages
German (de)
French (fr)
Other versions
EP0942548A2 (en
Inventor
Futoshi Izumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0942548A2 publication Critical patent/EP0942548A2/en
Publication of EP0942548A3 publication Critical patent/EP0942548A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H04B10/296—Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0775—Performance monitoring and measurement of transmission parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0777—Monitoring line amplifier or line repeater equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0797—Monitoring line amplifier or line repeater equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2933—Signal power control considering the whole optical path
    • H04B10/2939—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/298—Two-way repeaters, i.e. repeaters amplifying separate upward and downward lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/071—Monitoring an optical transmission system using a supervisory signal using alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/078—Monitoring an optical transmission system using a supervisory signal using a separate wavelength

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

A trunk apparatus prevents a signal error due to a fluctuation in an optical power in a WDM communication system. A monitoring and controlling signal transmitting and receiving circuit (49) sends transmission power information regarding a transmission power monitored by a transmission power monitor (32) to an immediately proceeding trunk apparatus located on a downstream side of the local trunk apparatus. The monitoring and controlling signal transmitting and receiving circuit (49) receives transmission power information sent from an immediately preceding trunk apparatus located on an upstream side of the local trunk apparatus, and sends the received transmission power information to an automatic gain control circuit (43). The automatic gain control circuit (43) controls the optical amplifier based on the transmission power information received from the immediately preceding trunk apparatus so as to equalize the transmission power of the local trunk apparatus to the transmission power of the immediately preceding trunk apparatus.
EP98119793A 1998-03-11 1998-10-23 Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein Withdrawn EP0942548A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6006898 1998-03-11
JP06006898A JP3532759B2 (en) 1998-03-11 1998-03-11 Relay apparatus and transmission level control method for the same in WDM communication system

Publications (2)

Publication Number Publication Date
EP0942548A2 EP0942548A2 (en) 1999-09-15
EP0942548A3 true EP0942548A3 (en) 2004-09-15

Family

ID=13131411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119793A Withdrawn EP0942548A3 (en) 1998-03-11 1998-10-23 Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein

Country Status (3)

Country Link
US (1) US6466348B1 (en)
EP (1) EP0942548A3 (en)
JP (1) JP3532759B2 (en)

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EP1130819A1 (en) 2000-03-03 2001-09-05 Telefonaktiebolaget Lm Ericsson Method and device for determining gain tilt in optical amplifiers with measurement of the total gain
WO2001080466A1 (en) * 2000-04-14 2001-10-25 Fujitsu Limited Wavelength division multiplexing transmitter and optical output control method for optical wavelength division multiplexing transmitter
US7542675B1 (en) * 2000-05-30 2009-06-02 Nortel Networks Limited Optical switch with power equalization
US6804464B2 (en) * 2000-11-01 2004-10-12 Dowslake Microsystems Corporation Flexible and low cost wavelength management for optical networking
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US7106969B1 (en) * 2001-02-12 2006-09-12 Atrica Israel Ltd. Optical network terminator
US20030058494A1 (en) * 2001-06-27 2003-03-27 Roberts Kim B. Control of parameters in a global optical controller
CN1324829C (en) 2001-08-03 2007-07-04 华为技术有限公司 Method for implementing power equalization of dense wavelength divison multiplex system
CA2408674A1 (en) * 2001-10-17 2003-04-17 Tyco Telecommunications (Us) Inc. Output power monitoring in an optical preamplifier
US7058301B2 (en) * 2002-02-28 2006-06-06 Bosloy Jonathan L Apparatus and method for planned wavelength addition and removal in a wavelength division multiplexed system
US7042634B2 (en) * 2002-03-14 2006-05-09 Nippon Telegraph And Telephone Corporation Optical amplifier
JP3851836B2 (en) * 2002-04-19 2006-11-29 富士通株式会社 Wavelength multiplexing transmission system and wavelength multiplexing transmission apparatus
US7877019B2 (en) * 2002-10-16 2011-01-25 Tyco Electronics Subsea Communications Llc Optical receiver including a system and method of controlling gain of an optical amplifier
US7333732B2 (en) * 2004-12-30 2008-02-19 Tyco Telecommunications (Us) Inc. Optical receiver
JP3954072B2 (en) * 2002-12-19 2007-08-08 富士通株式会社 Optical level control method, optical level control apparatus, and wavelength division multiplexing optical network
US7466478B2 (en) 2002-12-19 2008-12-16 Fujitsu Limited Optical-level control method, optical-level control apparatus and wavelength-multiplexing optical network
IL153941A (en) * 2003-01-14 2008-06-05 Eci Telecom Ltd Technique for power control in optical networks
JP2005050257A (en) * 2003-07-31 2005-02-24 Toshiba Corp Electronic device having serial ata interface and automatic signal amplitude adjustment method
US7689131B2 (en) 2003-11-11 2010-03-30 Fujitsu Limited WDM system
JP4198082B2 (en) * 2004-03-24 2008-12-17 富士通株式会社 Optical amplifier gain monitoring method and apparatus
US7785785B2 (en) * 2004-11-12 2010-08-31 The Board Of Trustees Of The Leland Stanford Junior University Charge perturbation detection system for DNA and other molecules
JP4710357B2 (en) * 2005-03-09 2011-06-29 日本電気株式会社 Optical amplification apparatus, operation control method thereof, and program
US8428461B2 (en) * 2005-06-22 2013-04-23 Tellabs Operations, Inc. Apparatus for managing an optical signal
JP2007074511A (en) * 2005-09-08 2007-03-22 Sumitomo Electric Ind Ltd Optical amplifier and optical communication system
JP4940861B2 (en) 2006-09-28 2012-05-30 富士通株式会社 WDM optical transmission system
JP4850288B2 (en) * 2007-08-27 2012-01-11 富士通株式会社 Network management system, relay apparatus and method
WO2009066379A1 (en) 2007-11-21 2009-05-28 Fujitsu Limited Via designing device, via designing program, and via designing method
US7917030B2 (en) * 2007-12-03 2011-03-29 Buabbud George Fiber optic communication system with automatic line shutdown/power reduction
JP4909914B2 (en) * 2008-01-15 2012-04-04 株式会社日立製作所 Wireless terminal
JP2011077808A (en) * 2009-09-30 2011-04-14 Fujitsu Ltd Optical transmission system
JP5994311B2 (en) * 2012-03-19 2016-09-21 富士通株式会社 Optical transmission equipment
US10036396B2 (en) 2013-03-08 2018-07-31 Coriant Operations, Inc. Field configurable fan operational profiles
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US9819436B2 (en) 2013-08-26 2017-11-14 Coriant Operations, Inc. Intranodal ROADM fiber management apparatuses, systems, and methods
CN106170933B (en) * 2014-05-14 2019-04-12 华为海洋网络有限公司 A kind of optical repeater and optical fiber telecommunications system
CN107005334A (en) * 2014-09-11 2017-08-01 代表亚利桑那大学的亚利桑那大学董事会 Elastic optical is networked
JP2017103524A (en) 2015-11-30 2017-06-08 富士通株式会社 Network management device and network system
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Also Published As

Publication number Publication date
JPH11261490A (en) 1999-09-24
US6466348B1 (en) 2002-10-15
JP3532759B2 (en) 2004-05-31
EP0942548A2 (en) 1999-09-15

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